/*
 * Copyright 1999-2101 Alibaba Group.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.alibaba.fastjson;

import static com.alibaba.fastjson.util.TypeUtils.castToBigDecimal;
import static com.alibaba.fastjson.util.TypeUtils.castToBigInteger;
import static com.alibaba.fastjson.util.TypeUtils.castToBoolean;
import static com.alibaba.fastjson.util.TypeUtils.castToByte;
import static com.alibaba.fastjson.util.TypeUtils.castToBytes;
import static com.alibaba.fastjson.util.TypeUtils.castToDate;
import static com.alibaba.fastjson.util.TypeUtils.castToDouble;
import static com.alibaba.fastjson.util.TypeUtils.castToFloat;
import static com.alibaba.fastjson.util.TypeUtils.castToInt;
import static com.alibaba.fastjson.util.TypeUtils.castToLong;
import static com.alibaba.fastjson.util.TypeUtils.castToShort;
import static com.alibaba.fastjson.util.TypeUtils.castToSqlDate;
import static com.alibaba.fastjson.util.TypeUtils.castToTimestamp;

import java.io.Serializable;
import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;
import java.math.BigDecimal;
import java.math.BigInteger;
import java.util.Collection;
import java.util.Date;
import java.util.HashMap;
import java.util.LinkedHashMap;
import java.util.Map;
import java.util.Set;

import com.alibaba.fastjson.annotation.JSONField;
import com.alibaba.fastjson.parser.ParserConfig;
import com.alibaba.fastjson.util.TypeUtils;

/**
 * @author wenshao<szujobs@hotmail.com>
 */
public class JSONObject extends JSON implements Map<String, Object>, JSONAware,
		Cloneable, Serializable, InvocationHandler {

	private static final long serialVersionUID = 1L;
	private static final int DEFAULT_INITIAL_CAPACITY = 16;

	private final Map<String, Object> map;

	public JSONObject() {
		this(DEFAULT_INITIAL_CAPACITY, false);
	}

	public JSONObject(Map<String, Object> map) {
		this.map = map;
	}

	public JSONObject(boolean ordered) {
		this(DEFAULT_INITIAL_CAPACITY, ordered);
	}

	public JSONObject(int initialCapacity) {
		this(initialCapacity, false);
	}

	public JSONObject(int initialCapacity, boolean ordered) {
		if (ordered) {
			map = new LinkedHashMap<String, Object>(initialCapacity);
		} else {
			map = new HashMap<String, Object>(initialCapacity);
		}
	}

	public int size() {
		return map.size();
	}

	public boolean isEmpty() {
		return map.isEmpty();
	}

	public boolean containsKey(Object key) {
		return map.containsKey(key);
	}

	public boolean containsValue(Object value) {
		return map.containsValue(value);
	}

	public Object get(Object key) {
		return map.get(key);
	}

	public JSONObject getJSONObject(String key) {
		Object value = map.get(key);

		if (value instanceof JSONObject) {
			return (JSONObject) value;
		}

		return (JSONObject) toJSON(value);
	}

	public JSONArray getJSONArray(String key) {
		Object value = map.get(key);

		if (value instanceof JSONArray) {
			return (JSONArray) value;
		}

		return (JSONArray) toJSON(value);
	}

	public <T> T getObject(String key, Class<T> clazz) {
		Object obj = map.get(key);
		return TypeUtils.castToJavaBean(obj, clazz);
	}

	public Boolean getBoolean(String key) {
		Object value = get(key);

		if (value == null) {
			return null;
		}

		return castToBoolean(value);
	}

	public byte[] getBytes(String key) {
		Object value = get(key);

		if (value == null) {
			return null;
		}

		return castToBytes(value);
	}

	public boolean getBooleanValue(String key) {
		Object value = get(key);

		if (value == null) {
			return false;
		}

		return castToBoolean(value).booleanValue();
	}

	public Byte getByte(String key) {
		Object value = get(key);

		return castToByte(value);
	}

	public byte getByteValue(String key) {
		Object value = get(key);

		if (value == null) {
			return 0;
		}

		return castToByte(value).byteValue();
	}

	public Short getShort(String key) {
		Object value = get(key);

		return castToShort(value);
	}

	public short getShortValue(String key) {
		Object value = get(key);

		if (value == null) {
			return 0;
		}

		return castToShort(value).shortValue();
	}

	public Integer getInteger(String key) {
		Object value = get(key);

		return castToInt(value);
	}

	public int getIntValue(String key) {
		Object value = get(key);

		if (value == null) {
			return 0;
		}

		return castToInt(value).intValue();
	}

	public Long getLong(String key) {
		Object value = get(key);

		return castToLong(value);
	}

	public long getLongValue(String key) {
		Object value = get(key);

		if (value == null) {
			return 0L;
		}

		return castToLong(value).longValue();
	}

	public Float getFloat(String key) {
		Object value = get(key);

		return castToFloat(value);
	}

	public float getFloatValue(String key) {
		Object value = get(key);

		if (value == null) {
			return 0F;
		}

		return castToFloat(value).floatValue();
	}

	public Double getDouble(String key) {
		Object value = get(key);

		return castToDouble(value);
	}

	public double getDoubleValue(String key) {
		Object value = get(key);

		if (value == null) {
			return 0D;
		}

		return castToDouble(value);
	}

	public BigDecimal getBigDecimal(String key) {
		Object value = get(key);

		return castToBigDecimal(value);
	}

	public BigInteger getBigInteger(String key) {
		Object value = get(key);

		return castToBigInteger(value);
	}

	public String getString(String key) {
		Object value = get(key);

		if (value == null) {
			return null;
		}

		return value.toString();
	}

	public Date getDate(String key) {
		Object value = get(key);

		return castToDate(value);
	}

	public java.sql.Date getSqlDate(String key) {
		Object value = get(key);

		return castToSqlDate(value);
	}

	public java.sql.Timestamp getTimestamp(String key) {
		Object value = get(key);

		return castToTimestamp(value);
	}

	public Object put(String key, Object value) {
		return map.put(key, value);
	}

	public void putAll(Map<? extends String, ? extends Object> m) {
		map.putAll(m);
	}

	public void clear() {
		map.clear();
	}

	public Object remove(Object key) {
		return map.remove(key);
	}

	public Set<String> keySet() {
		return map.keySet();
	}

	public Collection<Object> values() {
		return map.values();
	}

	public Set<Map.Entry<String, Object>> entrySet() {
		return map.entrySet();
	}

	@Override
	public Object clone() {
		return new JSONObject(new HashMap<String, Object>(map));
	}

	public boolean equals(Object obj) {
		return this.map.equals(obj);
	}

	public int hashCode() {
		return this.map.hashCode();
	}

	public Object invoke(Object proxy, Method method, Object[] args)
			throws Throwable {
		Class<?>[] parameterTypes = method.getParameterTypes();
		if (parameterTypes.length == 1) {
			Class<?> returnType = method.getReturnType();
			if (returnType != void.class) {
				throw new JSONException("illegal setter");
			}

			String name = null;
			JSONField annotation = method.getAnnotation(JSONField.class);
			if (annotation != null) {
				if (annotation.name().length() != 0) {
					name = annotation.name();
				}
			}

			if (name == null) {
				name = method.getName();
				if (!name.startsWith("set")) {
					throw new JSONException("illegal setter");
				}

				name = name.substring(3);
				if (name.length() == 0) {
					throw new JSONException("illegal setter");
				}
				name = Character.toLowerCase(name.charAt(0))
						+ name.substring(1);
			}

			map.put(name, args[0]);
			return null;
		}

		if (parameterTypes.length == 0) {
			Class<?> returnType = method.getReturnType();
			if (returnType == void.class) {
				throw new JSONException("illegal getter");
			}

			String name = null;
			JSONField annotation = method.getAnnotation(JSONField.class);
			if (annotation != null) {
				if (annotation.name().length() != 0) {
					name = annotation.name();
				}
			}

			if (name == null) {
				name = method.getName();
				if (name.startsWith("get")) {
					name = name.substring(3);
					if (name.length() == 0) {
						throw new JSONException("illegal getter");
					}
					name = Character.toLowerCase(name.charAt(0))
							+ name.substring(1);
				} else if (name.startsWith("is")) {
					name = name.substring(2);
					if (name.length() == 0) {
						throw new JSONException("illegal getter");
					}
					name = Character.toLowerCase(name.charAt(0))
							+ name.substring(1);
				} else {
					throw new JSONException("illegal getter");
				}
			}

			Object value = map.get(name);
			return TypeUtils.cast(value, method.getGenericReturnType(),
					ParserConfig.getGlobalInstance());
		}

		throw new UnsupportedOperationException(method.toGenericString());
	}
}
